function chkdiv(divid){
	var chkid=document.getElementById(divid);
	if(chkid != null){return true; }
	else {return false; }	
}
if (chkdiv('fy')){
	document.getElementById('fy').innerHTML='上一篇：<a href="/News/2010-4/24160">高一4月份周练试题荟萃 </a>  下一篇：<a href="/News/2010-4/24162">生物新人教版必修1课件 </a> ';
}